Centering-gage.



R. L. CARTER.

CENTERING GAGE. APPLICATION FILED OCT. 29. ss.

Patented Apr. 29,1919.

I I ,a {0 z I NVENTOR.

Way L. Cai/'T r- A TT ORNE Y.

RAY I. CARTER, SYRACUSE, NEW YORK.

CENTEBING-GAGE.

Specificaton of Letters Patent.

Patented Api'. se, rere.

Application filed October 29, 1918. Serial No. %0,187.

To all whom it may concern:

Be it known that I, B AY L. CARTER, aeitizen of the Unit-ed States, residing at Syracuse, in the. county of Onondaga and State of New York, have invented certain new and useful lniproveinents in Centering-Gagesmf which the following is a speciication.

This inven t-ic n relates to iinproveinents in centering gages, designed for use by patternni'ahers, tool-makers and the' manufacturers, and has for its object to provide a novel and simple device of the class, for readily, quickly and accurately locating and marking the various Centers on patterns and other work, particularly where bosses, reinforcements, or bearings are to be positioned, so that when the castings are made they will have accurately located centers, to enable the me'- chanics to bore or otherwise operate upon them. A further object is to provide a sta tionary table or bed for supporting the work, the said bed having a common centering socket. A further object is to provide a grooved standard or guide and mounting thereon a vertically slidable and adjustable bracket which supports the centering punch or marker in line axially with said socket. And a further object isto generally improve and siinplify the Construction, as well as to render more convenient and accurate, devices for locating and narkingcenters.

1 attain these objects by the means set forth in the detailed description which fol lows, and as illustrated by the accompanying drawing, in which- Figure l is a horizontal section, taken on line 1-1 of Fig. 2; showing a top-plan View' of the bed and related parts.

Fig. 2 is a central vertical section, taken on line 2-2 of Fig. 1; showing the `construc tion, arrangenent and operation of the gage.

Fig. 3 is a top-plan view of the marker support.

Fig. 4 is a combined edge and end view of the key which operates in the g-rcoved standard.

In the drawing, 2 represents the hollow base or bed or the machine, preferably made of metal, having aring depending margins 3, and a plurality of semi-circular bosses or feet 'c, which extend the depth of the fianges 3, for stifi'enng the bed 2. The bed 2' is preferably provided with a laterally extending neck or arm 5, the free end of which is' split, as at 5', and adjacent said split said neck is provided with a vertically disposeol boss 6, which receives the lower end of a round standard or guide 7, the latter being clamped and held rigidly in said boss by a screw 8, which passes loosely through one aw 9, and is then threaded into the corresponding jaw 9'. The bed and also the neck are perforated, as at 10, to receive screws or nails (not shown) for rigidly securing the gage to a bench or other suitable support. The top surface of the bed 2 is provided with a sockct 11, adapted to receive a cylindrical centering part 12, which substantially fits the socket, the said part having an upwardly proj ecting pin point 13, which is inserted into a pattern or other part, at any point where a center has been previously located or laid out by the pattern-inaker or mechanic (see Fig. 2, which shows by dotted lines a pattern or other piece of work A, to. which the centering part 12 is applied).

The standard' or guide 7 is provided with a longitudinal V-shaped groove 14, which faces the split 5 and in which is disposed a substantially square key or block 15, the latter being provided with a notch or cut-out 15', which faces rearwardly away from said groove. 16 represents a bracket or arin. the head-end of which is bored out to receive and slide on the standard 7, while the opposite or free end of said arm is provided with a cylindrieal portion 16, which is bored out vertically to receive and support the marlrer or centering punch 17, the latter being so positioned that its point 17' is normally held in line aXially with the point of the pin 13 (see Fig. 2). The head of the bracket 16 which receives the standard is apertured, as at 16, and in this aperture is disposed the key 15. Adjacent the said aperture said bracket is perforated and threaded to receive a setscrew 20, which holds the bracket in any adjusted position. To accomplsh this, the inner end of the screw 20 is positioned in the notch 15' of the key 15 and when screwed up tight, forces and holds the key in the groove 14. The full and dotted lines in 2, show how the arm or bracket 16 may be adjusted, by the loosening of the screw 20. By providing the V-shaped groove or way 14 in the standard, and the square key 15, the bracket 16 is prevented froni even the slightest lateral movement which might interfere with the accurate centering of the work by the parts 12 and 17.

In practice, before the work A is placed upon the bed 2, the pattern-inaker or mechanic first lays out one or more Centers or points in the usual manner. These Centers are usually marked upon a fiat or level surface of the work. The neXt step is to insert one of the centering pins 13 into the work at the located center, then the pattern or work is laid upon the bed 2, and the part 12 inserted into the socket 11, which thereafter holds the work A in the proper position for the centering operation. The arm 16 is next adjusted vertically on the standard 7, until the point 17' of the puneh is brought within reach of the upper surface of the work. If the latter is made of wood, the weight of the puneh 17, supplemented by a slight pressure of the hand will cause the point 17' to priek or dent the pattern A at apoint exaotly opposite, or in line with the point of the pin 13. If the work is metal, the workman may strike the head of the puneh 17 a blow with a hammer for marking the new center, as at 21 in Fig. 2.

My centering gage is extremely simple, and is capable of performing reliable and accurate work, and in addition, by its use a great deal of time may be saved, which here tofore has been spent in the slow and tedious work of laying-out the co-inciding centers.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent, is

1. A centering gage, comprising a fiat top bed having a centering soeket facing upwardly adapted to receive a centering-pin for positioning the work, said bed having a rearwardly projecting neck, the said neck having a split boss which is bored out vertically, an upright guide' telescoping said boss and clamped therein, said guide having a V-shaped groove facing the split in said boss, a vertically adjustable arm having an apertured head slidable on said guide, the free end of said arm adapted to support a Vertieally movable centering puneh, and means comprising a square key slidable in said groove and a set-screw for holding said arm in different adjusted positions on said guide.

2. A centering gage comprising a fiat bed having an upwardly facing socket adapted to receive a centering-pin and having a rearwardly extending neck, the free end of said neck provided With a split hollow boss, an upright guide rigidly clamped in said boss, said guide having a groove facing the split in the neck, a vertically movable arm s1idable on said guide, the free end of the arm supporting a centering puneh in line axially With the centering-pin, and means comprising a key earried by said arm for holding the latter in different positions relatively to the bed and for preventing lateral variation of said arm.

3. A centering gage, including a bed having a socket adapted to receive a centering pin and having a lateral neck provided with a split perforated boss, an upright standard having a groove clamped in said boss at right angles to the' plane of the bed, a vertically movable centering puneh support provided with an apertured head which is slidable on said standard, a key positioned in the aperture of the head engaging the groove in said standard, and a screw for holding said support in the adjusted positions.

4. A centering gage comprising a fiat-top bed having' a centering socket facing up- Wardly adapted to receive a centering pin for positioning the work, said bed having a rearwardly projecting split neck, an upright guide clamped in the split neck, and having a V-shaped groove facing away from the bed, an arm having an apertured head slidable on said guide, a centering puneh supported by the free end of said arm in line axially with said socket, and means for holding said arm in different adjusted positions and for preventing lateral variations of said arm.

In testimony whereof I aiiix my signature.

RAY L. CARTER.

copies of this patent may be obtained for five cents each, by addressng the "Commissioner of Patents, Washington, D. GJ* 

